田畑輪換田における水稲（Oryza sativa L.）収量変動の要因解明

日本作物学会紀事

池永 幸子¹  稲村 達也¹  松本 二香¹ 

[1] 京都大学大学院農学研究科

关键词: Paddy rice;    水稲;    Paddy-upland rotation;    田畑輪換;    Single crop;    一毛作田;    Soil nitrogen mineralization;    土壌窒素無機化量;    Yield components;    収量構成要素;   

DOI  :  10.1626/jcs.76.28

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

The source of the variation of yield and yield components of paddy rice was analyzed in the paddy-upland rotational fields (rice-wheat-soybean) and in the single-cropped paddy fields from 1998 to 2003. Yield variations were affected by spikelet number. Panicle number and spikelet number per panicle contributed to yield when spikelet number was less than 32800 m-2, and percentage of ripened grains and 1000-grain weight when spikelet number was 32800 m-2 or more. Spikelet number that was controlled by panicle number was influenced by soil mineralization that is different between/within paddy-upland rotational fields and single cropping field. We conclude that proper management of fertilization is essential to obtain adequate panicle number for the optimum yield of paddy-upland rotational fields and in single cropping fields separately.

【 授权许可】

Unknown